- Aug 7, 2003
- 8,087
To believe that, in the last 350 years, we now understand all the laws of physics relating to our 14 - 28 billion year old universe is stretching it a bit.
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[News] Congressional hearing on UFOs
- Thread starter BBassic
- Start date
Guy Fawkes
The voice of treason
- Sep 29, 2007
- 8,297
The amount of energy required to accelerate towards the speed of light is so massive, and as you get closer to it, you'd require incredible amounts of energy just to gain a tiny fraction of speed
The fastest man made craft to travel in space (Parker Solar probe) reached a speed of 163km/s (586,800 km/hr or 364,660mph) using gravitational sling shots to gain that speed
To reach the nearest star (approximately 4.2 light years away or 6 trillion miles / 9 trillion kilometers) so would take 6,630.26 years. - The speed of light is 299,792,458 meters a second (186,282 miles per second)
Then there is the issue of how to slow down
Fastest spacecraft speed
www.guinnessworldrecords.com
That is before you start to consider just how vast spce is and the distances involed to reach anywhere and the distances so large. You also have billions of stars, each potentially have their own planets (by the time the light reaches us from them, they may no longer exist) so how would any alien race firstly find and select our planet / solar system to visit, and then be able to travel to us
If we are optimistic, and we assume an advanced extraterrestrial species has the technological capabilities to detect humanity's very first radio waves (and distinguish them from the general background noise of the universe), we can estimate our farthest signals are a little more that 100 light years away. So before those signals reach anywhere, they'd have no reason to head this way.
There are 59,722 stars visible with a telescope within 100 light-years of our solar system so the likelyhood of a civilisation with the technology to travel at the speed of light receive and interpret that signal, pin-point it's origin and then be able to travel there is extremely unlikely . You also then have to factor in that they wouldn't know what the environment, etc would be like once they arrive, so gravity, atmosphere, etc and whether their transport would be able to cope with it.
If you use 50 light years (time for that signal to reach them, and they then head out immediately at the speed of light to reach us) there are then only about 1800 stars
Cox has come out this morning and suggested we’ll have developed interstellar travel by the next century IF (big) we survive.The amount of energy required to accelerate towards the speed of light is so massive, and as you get closer to it, you'd require incredible amounts of energy just to gain a tiny fraction of speed
The fastest man made craft to travel in space (Parker Solar probe) reached a speed of 163km/s (586,800 km/hr or 364,660mph) using gravitational sling shots to gain that speed
To reach the nearest star (approximately 4.2 light years away or 6 trillion miles / 9 trillion kilometers) so would take 6,630.26 years. - The speed of light is 299,792,458 meters a second (186,282 miles per second)
Then there is the issue of how to slow down
Fastest spacecraft speed
That is before you start to consider just how vast spce is and the distances involed to reach anywhere and the distances so large. You also have billions of stars, each potentially have their own planets (by the time the light reaches us from them, they may no longer exist) so how would any alien race firstly find and select our planet / solar system to visit, and then be able to travel to us
If we are optimistic, and we assume an advanced extraterrestrial species has the technological capabilities to detect humanity's very first radio waves (and distinguish them from the general background noise of the universe), we can estimate our farthest signals are a little more that 100 light years away. So before those signals reach anywhere, they'd have no reason to head this way.
There are 59,722 stars visible with a telescope within 100 light-years of our solar system so the likelyhood of a civilisation with the technology to travel at the speed of light receive and interpret that signal, pin-point it's origin and then be able to travel there is extremely unlikely . You also then have to factor in that they wouldn't know what the environment, etc would be like once they arrive, so gravity, atmosphere, etc and whether their transport would be able to cope with it.
If you use 50 light years (time for that signal to reach them, and they then head out immediately at the speed of light to reach us) there are then only about 1800 stars
Van Cleef
Well-known member
- Jun 17, 2023
- 846
What is it with this guy!
I've read the whole tweet (X) - no mention of where Caicedos going or are we getting a new right back.
Pathetic.
Baldseagull
Well-known member
I am not sure it works like that for light, I thought it was not possible to make the speed of light appear greater by moving towards the source at high speed? I think I read that measuring the speed of light both with and against earths rotational speed produced the same figure? I may be 20 years out of date on that though.
Also, would a return trip to our nearest neighbour star at light speed take 9 years for the traveller, or for those that remained on earth?
Are we absolutely sure the “non-human” remains aren’t just one of the animals the Soviets fired into space in the 1950s?
Muzzman
Pocket Rocket
Sounds like a novel by Philip K Dick…
Crawley Dingo
Political thread tourist.
- Mar 31, 2022
- 1,080
They are going to give high tech areas a good sniffing out to access any threats.
Tom Hark Preston Park
Will Post For Cash
- Jul 6, 2003
- 72,327
This. Especially as the medieval-levels-of-ignorance-sounding Dark Matter is thought to account for approximately 85% of the matter in the universe and nobody has the slightest scoobie as to what it actually is, or if it even exists. Some huge physics breakthroughs still to be made, it would appear
- Aug 7, 2003
- 8,087
Precisely. According to the "Standard Model" of cosmology, the Universe is 68% dark energy, 27% dark matter, 5% normal matter. We have a lot to learn.
Crawley Dingo
Political thread tourist.
- Mar 31, 2022
- 1,080
The X-files were documentaries.
We have not figured it out .............................THEY HAVE . Human arrogance at it`s best .The amount of energy required to accelerate towards the speed of light is so massive, and as you get closer to it, you'd require incredible amounts of energy just to gain a tiny fraction of speed
The fastest man made craft to travel in space (Parker Solar probe) reached a speed of 163km/s (586,800 km/hr or 364,660mph) using gravitational sling shots to gain that speed
To reach the nearest star (approximately 4.2 light years away or 6 trillion miles / 9 trillion kilometers) so would take 6,630.26 years. - The speed of light is 299,792,458 meters a second (186,282 miles per second)
Then there is the issue of how to slow down
Fastest spacecraft speed
That is before you start to consider just how vast spce is and the distances involed to reach anywhere and the distances so large. You also have billions of stars, each potentially have their own planets (by the time the light reaches us from them, they may no longer exist) so how would any alien race firstly find and select our planet / solar system to visit, and then be able to travel to us
If we are optimistic, and we assume an advanced extraterrestrial species has the technological capabilities to detect humanity's very first radio waves (and distinguish them from the general background noise of the universe), we can estimate our farthest signals are a little more that 100 light years away. So before those signals reach anywhere, they'd have no reason to head this way.
There are 59,722 stars visible with a telescope within 100 light-years of our solar system so the likelyhood of a civilisation with the technology to travel at the speed of light receive and interpret that signal, pin-point it's origin and then be able to travel there is extremely unlikely . You also then have to factor in that they wouldn't know what the environment, etc would be like once they arrive, so gravity, atmosphere, etc and whether their transport would be able to cope with it.
If you use 50 light years (time for that signal to reach them, and they then head out immediately at the speed of light to reach us) there are then only about 1800 stars
The "Fermi paradox" is a get out clause for the arseholes who DONT KNOW , but cant bring themselves to admit it .
They are the scientists
who say crap like " extraordinary claims require extraordinary evidence" 
when something a mile long travelling at 6000 mph is picked up on radar it ain`t big bird , or a f****** weather balloon .
- Apr 5, 2014
- 25,922
Well Martians landed at Woking so I wouldn't put it past them.
For what it's worth I care little. I think it's possible there may be other life forms, and that they may have popped by. But until they show up and pop in for a cuppa I'll carry on in blissful ignorance.
Statement 1:
Earth is the only planet to host intelligent life form - we are entirely alone in the universe.
Statement 2:
There are other planets out there inhabited by intelligent life form.
One of these statements must be true.
Which freaks you out more?
Earth is the only planet to host intelligent life form - we are entirely alone in the universe.
Statement 2:
There are other planets out there inhabited by intelligent life form.
One of these statements must be true.
Which freaks you out more?
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Originunknown
BINFEST'ING
The truth is often stranger than fiction.
In terms of our known universe, it's recently thought to have been around twice as old at over 26 billion years. We've existed as a species on Earth for an extremely small small stitch in this time.
In terms of our known universe, it's recently thought to have been around twice as old at over 26 billion years. We've existed as a species on Earth for an extremely small small stitch in this time.
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KZNSeagull
Well-known member
1. If we are the most intelligent life form in the universe then that's a bit shit really.
This.The amount of energy required to accelerate towards the speed of light is so massive, and as you get closer to it, you'd require incredible amounts of energy just to gain a tiny fraction of speed
The fastest man made craft to travel in space (Parker Solar probe) reached a speed of 163km/s (586,800 km/hr or 364,660mph) using gravitational sling shots to gain that speed
To reach the nearest star (approximately 4.2 light years away or 6 trillion miles / 9 trillion kilometers) so would take 6,630.26 years. - The speed of light is 299,792,458 meters a second (186,282 miles per second)
Then there is the issue of how to slow down
Fastest spacecraft speed
That is before you start to consider just how vast spce is and the distances involed to reach anywhere and the distances so large. You also have billions of stars, each potentially have their own planets (by the time the light reaches us from them, they may no longer exist) so how would any alien race firstly find and select our planet / solar system to visit, and then be able to travel to us
If we are optimistic, and we assume an advanced extraterrestrial species has the technological capabilities to detect humanity's very first radio waves (and distinguish them from the general background noise of the universe), we can estimate our farthest signals are a little more that 100 light years away. So before those signals reach anywhere, they'd have no reason to head this way.
There are 59,722 stars visible with a telescope within 100 light-years of our solar system so the likelyhood of a civilisation with the technology to travel at the speed of light receive and interpret that signal, pin-point it's origin and then be able to travel there is extremely unlikely . You also then have to factor in that they wouldn't know what the environment, etc would be like once they arrive, so gravity, atmosphere, etc and whether their transport would be able to cope with it.
If you use 50 light years (time for that signal to reach them, and they then head out immediately at the speed of light to reach us) there are then only about 1800 stars
But.....what about using warp factors, like captain Kirk?
Or the infinite improbability drive of the Heart of Gold?
And just because you can't see space aliens it doesn't mean they aren't here. Which proves that they are here.
And for an encore, I shall now explain how Brexit is a good idea.
Oh, hang on. No, scrub that.
Cox often shouts about his estimate that there is probably only one intelligent civilisation in our galaxy (us). A galaxy containing over 100 billion stars and countless more planets.The "Fermi paradox" is a get out clause for the arseholes who DONT KNOW , but cant bring themselves to admit it .
They are the scientists
But, if his estimate is correct (1 civilisation per galaxy), that would equate to 200 billion extraterrestrial civilisations in the visible Universe.